Since we've touched on SI, I guess it's appropriate for me to ask if you think Specialization in SI is worthwhile? Or is it a no brainer to pump the points into Psychosis itself? Locus of Control cooldown as well as Premed both look juicy too. There are so many routes to go with Spec points I feel somewhat overwhelmed as to what is optimal.
I think Premeditation cooldown reduction is the best 2 points you can spend as psi. I tried LoC cooldown reduction but didn't much like it since I rarely had fights go long enough to use it twice even with the reduction. SI Psychosis specializes in SURPRISE YOU'RE DEAD and that doesn't really lend itself to needing cooldown reduction; you just wait for your psi to regen and by the time you're topped off, most of your cooldown are good to go, too.
I'm not impressed by psychosis specialization either, but I haven't ever (that I can recall) played a psi character without Biology so I always have a great stash of drugs for when I want buffs. The bonus crit isn't what gets you to 100%, and you'll have plenty of psi cost reduction from gear so that extra 5% won't make a noticeable difference.
SI spec might be good. The additional health buffer gives you room to make some mistakes - though I've read from some of the veteran players here that they were able to run most of the game at 1HP and just never get hit, I don't recommend that sort of zero-margin playstyle unless you just know you want to do it. Again, the bonus crit will be something you sort of need to decide for yourself, but it doesn't impress me.
You've got Psionic Mania for a guaranteed crit when you need it; you've got Trance and Focus Stim for when you need more than one big heavy hit at a time. And even as Psychosis, you're still going to be using quite a few abilities that either cannot crit, or don't really need to. I would say put your first two points in Premeditation cooldown reduction and see if your playstyle doesn't show you where you need to take it. You'll be level 17 by the time you have to think about where else points should go, and I'd bet you'll have figured out a bunch of things regarding how you play the game.